=pod
=head1 NAME
sanity - The ONLY meta pragma you'll ever need!
=head1 VERSION
version 0.92
=head1 SYNOPSIS
use sanity;
use sanity 'strictures';
use sanity 'Modern::Perl';
use sanity qw(
strictures -warnings/uninitialized/FATAL
NO:autovivification NO:autovivification/store
PRINT_PRAGMA_HASH
);
use sanity '!0*b^Npow{8T7_yZt lines of header in front of every module
they write.
Personal opinions and pragmas don't really belong in the CPAN namespace. (It's
CPAN, not Personal PAN. If you want a Personal PAN, go call Pizza Hut.) But
copying code on potentially hundreds of modules doesn't make sense, either.
That was my mentality when I had a personal opinion of my own. Why repeat the same
problem like everybody else?
This "sanity" module attempts to level the playing field by making it a
B personal pragma, allowing you to both reduce the code needed and
still implement all of the modules/pragmas you need.
As an illustration to what it's capable of, this pragma will emulate all of the
other personal pragmas, most of them 100% working exactly how they do it.
=head1 PARAMETERS
Sanity's parameters fall into three types: flags, aliases, and hashes. (Oh my!)
=head2 Flags and Aliases
Flags are single pragma/module declarations, strict/warning flags, or other
items that need flags. Aliases are merely one or more flags, grouped
together to better emulate the pragma/module's functionality.
Let's start off with an example:
# These three statements do the same thing as...
use Modern::Perl;
use sanity 'Modern::Perl';
use sanity qw(strict warnings mro/dfs feature IO::File IO::Handle);
# ...these statements
use strict;
use warnings;
use mro 'dfs';
use feature ':all';
use IO::File;
use IO::Handle;
Basically, it does the same thing as the meta pragma L, except
you actually don't need that module for it to work. While there is some magic
to make sure, say, C gets loaded with various versions of Perl, it typically
just works using a standard C call. The C and C flags
are combined aliases that enable all of the warnings that they would do via a standard
call.
=head3 Negating flags/aliases
You can turn off flags in the statement:
use sanity qw(Modern::Perl -mro/dfs);
This does the same thing as above, except it doesn't import the C pragma. You
can negate any flag, including combined aliases, as long as it makes sense. In other
words, you need a positive included before you can negate something.
=head3 NO:* flags/aliases
Some pragmas work by using the C> function, so that the English makes sense.
To keep that syntax, these pragmas are included with a C prefix:
use sanity 'NO:multidimensional';
use sanity 'NO:indirect/FATAL';
This will run the C function on these pragmas, even though sanity was called
via the C function (via C).
=head3 Perl versions
Sanity also supports Perl versions as a special kind of alias to specify minimum Perl
versions:
# These are all the same:
use v5.10.1;
use sanity 'v5.10.1';
use sanity v5.10.1; # as a VSTRING
use sanity 5.10.1; # works too
# Upgrade the Perl version of your favorite pragma
use sanity qw(NO:nonsense v5.12);
Note that the version must be at least v5.8. This should be fine for most people. (If
I get a ticket requesting support for a Perl version older than one released in 2002, I
will hunt you down and break your keyboard in half.)
=head3 The Default
What does C do without any parameters? Why my personal preference, of course :)
It's listed in the C section of the L below. I detail the
reasons behind my choices L.
=head2 Hashes
So, there's all of these flags, but unless you're using one of the combined aliases,
typing them all out is usually just as much (or more) code as the several lines of C
statements. Well, they are all flags so that it fits into a giant bitmap, and that
bitmap can be compressed into a large ASCII (or UTF-8) "number".
This number can be calculated using the flag C:
# This is merely the definition of uni::perl
use sanity (qw(
v5.10 strict feature/5.10
), (
map { "warnings/$_/FATAL" } qw(closed threads internal debugging pack substr malloc
unopened portable prototype inplace io pipe unpack regexp deprecated exiting glob
digit printf utf8 layer reserved parenthesis taint closure semicolon)
), qw(
-warnings/exec/FATAL
-warnings/newline/FATAL
utf8
open/utf8
open/std
mro/c3
Carp
), 'PRINT_PRAGMA_HASH');
# Outputs:
# use sanity '!04[D{9Fhfqc-7m738S4HK6B#D5=v{,T$(0)F5i'; # Safer ASCII version
# use sanity '¡05༕ቑ釩腜쥸봱楇䐍퇥熠ᾯ緻褻真堩'; # Shorter UTF8 version
You can use that hash as the output illustrates without having to type out the entire big
set of commands or flags.
=head2 Other Meta Pragmas
Have your own set that is too long, and you don't like the ugliness of the hash? Send me
your suggestion and I'll probably add it in.
=head1 CAVEATS
=head2 'NO:' ne '-'
A C flag is NOT the same as negating a flag! You also cannot remove the C
from a flag, as it's part of the name of the flag, not a special modifier.
# These two are NOT the same!
use sanity 'NO:indirect'; # runs indirect->unimport()
use sanity '-indirect'; # Dies, as there is no such flag/alias
# This runs through the strictures alias and runs autovivification->unimport()
use sanity qw(strictures NO:autovivification);
# This runs through the strictures alias WITHOUT running indirect->unimport()
use sanity qw(strictures -NO:indirect);
use sanity '-indirect'; # This isn't what you want...
no sanity 'NO:indirect'; # ...you really meant to do this...
use indirect; # ...but this is better
=head2 Special clearing of strict/warnings
Since most people want exactly the strictness and warnings they specify, sanity will
clear these out first before running through the list.
# This...
use sanity qw(strict -strict/vars);
# ...is the same as this...
no strict;
use strict qw(subs refs);
Also, some special magic is in place to ensure that newer warnings/features aren't
fatal to older Perls. See L.
=head2 "Author" pragmas
Certain pragmas really only exist to make sure the code is designed right. These
pragmas are deemed "optional" by C. In other words, if the user doesn't
have them, it will just silently ignore them and move on. If C thinks your
an author/coder of the module itself (.git/svn/$ENV checks), it will give you a
warning that they are missing, but move on.
The following modules don't "instadie". Modules that fall under this list don't
change the nature of how Perl works, or would let you do something that would
normally fatally error.
overloading
autovivification
indirect
multidimensional
bareword::filehandles
criticism
# (autovivification probably shouldn't be here, since it actually
# prevents autoviv, but it's generally used as an author tool.)
This feature was borrowed from L and tweaked.
=head1 LIST OF FLAGS
=head2 Emulation of "meta pragmas"
ex::caution:
strict
warnings
NO:crap: # Same as above
latest:
strict
warnings
feature
sane:
strict
warnings
feature
utf8
NO:nonsense:
strict
warnings
true
namespace::autoclean
Modern::Perl:
strict
warnings
mro 'dfs'
feature
IO::File
IO::Handle
strictures: (without the 5.8.4 checks; that crap is old)
v5.8.4 (forced, to make sure things work)
strict
warnings FATAL => 'all'
no indirect 'fatal'
no multidimensional
no bareword::filehandles
common::sense: (without the "memory usage" BS)
utf8
strict qw(subs vars)
feature qw(say state switch)
no warnings
warnings FATAL => qw(closed threads internal debugging pack malloc portable prototype
inplace io pipe unpack deprecated glob digit printf
layer reserved taint closure semicolon)
no warnings qw(exec newline unopened);
uni::perl: (ditto)
v5.10
strict
feature qw(say state switch)
no warnings
warnings qw(FATAL closed threads internal debugging pack substr malloc
unopened portable prototype inplace io pipe unpack regexp
deprecated exiting glob digit printf utf8 layer
reserved parenthesis taint closure semicolon)
no warnings qw(exec newline)
utf8
open (:utf8 :std)
mro 'c3'
Carp
sanity:
v5.10.1
utf8
open (:utf8 :std)
mro 'c3'
strict qw(subs vars)
no strict 'refs'
warnings FATAL => 'all'
no warnings qw(uninitialized)
feature
no autovivification qw(fetch exists delete store strict)
no indirect 'fatal'
no multidimensional
namespace::sweep
perl5i::0 / 1 / 2 / latest:
[the real module] (the pragma is too insane to try to duplicate here)
Acme::Very::Modern::Perl: (a joke, but it's still here all the same)
strict
warnings
mro 'c3'
feature
IO::File
IO::Handle
utf8
open (:utf8 :std)
no warnings
warnings FATAL => qw(closed threads internal debugging pack malloc portable prototype
inplace io pipe unpack deprecated glob digit printf
layer reserved taint closure semicolon)
no warnings qw(exec newline unopened);
perl5i::latest
Toolkit
Carp
=head2 Other flags/aliases
strict/* => strict '[whatever]' # supports all flags
strict => strict qw(refs subs vars)
# other "hints"
integer
locale
bytes
re/taint
re/eval
filetest
utf8
NO:overloading
warnings/* => warnings NONFATAL => '[whatever]' # supports all flags, multi or not
warnings/*/FATAL => warnings FATAL => '[whatever]' # supports all flags; FATAL trumps NONFATAL
warnings => warnings NONFATAL => 'all'
warnings/FATAL => warnings FATAL => 'all'
feature/* => feature '[whatever]' # supports all flags
feature/5.## => # similar to feature enabling via 'use v5.##'; major version only
feature/5.9.5 => # also exists, just like feature/5.10
feature => feature ':all' # not exactly, but in spirit
# Perl versions, described above
v5.##.##
# autodie
autodie/* => autodie ':[whatever]' # supports all _category_ flags, like all, io, shm, etc.
# (Will expand if requested, but I don't want to waste
# all of that bit space right now.)
autodie => autodie ':default'
# other CORE pragmas
bigint
bignum
bigrat
charnames
charnames/short
charnames/full
encoding::warnings
encoding::warnings/FATAL
mro/dfs # default for 'mro'
mro/c3
open/*
# namespace cleaners
namespace::clean # included last; adds -except => 'meta'
namespace::functions # included last
namespace::autoclean
namespace::sweep
# others
NO:autovivification/*
NO:autovivification => no autovivification qw(fetch exists delete)
criticism/*
criticism => criticism 'gentle'
perl5i::0
perl5i::1
perl5i::2
perl5i::3
perl5i::latest
NO:indirect
NO:indirect/global
NO:indirect/fatal
NO:multidimensional
NO:bareword::filehandles
subs::auto
utf8::all
IO::File
IO::Handle
IO::All
Carp
vendorlib
true
autolocale
Toolkit
Am I missing something? Let me know.
=head1 TODO
Actually need to write sanity::sanity POD.
=head1 AUTHOR
Brendan Byrd
=head1 COPYRIGHT AND LICENSE
This software is Copyright (c) 2012 by Brendan Byrd.
This is free software, licensed under:
The Artistic License 2.0 (GPL Compatible)